I'm no expert or nothing, but $150 each seems pretty expensive for relatively narrow 16" tires...
After a quick look at tirerack...
The Dunlop SP Winter Sport 3D tires scored high in their survey and are $96 each (American, before shipping) for the same size (205/55 16).
Those same tires at tirerack are $109 each (+ shipping). (I think these are the same tires.)
What do you want out of the tires? I mean, are you looking for good performance, maximum snow traction, etc.?